Add HLK-LD2420 mmWave Radar module component (#4847)

Co-authored-by: descipher <120155735+GelidusResearch@users.noreply.github.com>

esphome/components/ld2420/sensor/ld2420_sensor.cpp

@@ -0,0 +1,16 @@
+#include "ld2420_sensor.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace ld2420 {
+
+static const char *const TAG = "LD2420.sensor";
+
+void LD2420Sensor::dump_config() {
+  ESP_LOGCONFIG(TAG, "LD2420 Sensor:");
+  LOG_SENSOR("  ", "Distance", this->distance_sensor_);
+}
+
+}  // namespace ld2420
+}  // namespace esphome